This is a pack of four replacement JConcepts Slash 4x4 Front & Rear Shock Mount Standoffs. These are only compatible with the Slash 4x4 when equipped with the JCI2290-1 and JCI2291-1 Conversion Kits. The aluminum stand-offs are CNC machined aluminum, blue anodized and machined striped. They bolt directly to the JConcepts shock towers.